Ernest leslie ransome



PATENTED SEPT. 20, 1904.

E. L. RANSOME. MIXING MACHINE.

APPLICATION FILED APR. 1, 1902.

2 SHEETS-SHEET 1.

N0 MODEL.

No. 770,477. PATENTED SEPT. 20, 1904.

E. L. RANSOME.

MIXING MACHINE.

APPLIOATION FILED APR. 1, 1902.

NO MODEL. 2 SHEETS-SHEET-2.

0mm lllllllHllllllilIllllllll IIIIIIWWNIIIIIINIU W/ TNESSES: IN VENTOH V/ ai UNITED STATES Patented September 20, 1904.

ERNEST LESLIE RANSOME, OF NEI/V YORK, N. Y.

MIXING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 770,477, dated September 20, 1904.

'Application filed .Ipril 1, 1902. Serial No. 100,939.

To all whom it may concern.-

Be it known that I, ERNEST LESLIE RAN- SOME, a citizen of the United States, residing at Greater New York, in the State of New York, have invented Improvements in Mixing-Machines; and I hereby declare the following to be a description thereof.

My improvements relate to mixing-machines.

The objects of my improvements are to make a mixing-machine that will mix more thoroughly than the present continuous mixers now in use and that will avoid the locking and binding so common in such mixers.

My improvements consist, first, in the provision of means by which one or more helical bafflers'are mounted within a revoluble hollow member, such as a drum or shaft, in a wayto rotate therewith and to be withdrawn easily therefrom and replaced with despatoh; secondly, in the provision of means for maintaining a space between the revoluble member and one or more bafliers in order to prevent the lodgment or accumulation of material and to insure the operation of the bafflers without binding or locking the material undergoing treatment against any part of the machine; thirdly, to provide an improved construction of bafliers which operates in an eificient manner to quickly and thoroughly mix the materials, and, finally, in the construction and arrangement of parts which will be defined by the annexed claims.

Figure 1 is arevolving hollow shaft or drum with the head K. It is partly in section showing two helical bafl'lers of the same diameter placed inside. Fig. 2 is a cross-section of the drum and bafflers of Fig. 1, the plane of the section being indicated by the dotted line X X, said view looking toward the head K. Fig. 3 is a cross-sectionon the line S S of Fig. 4, also looking toward the head K and showing a preferred form of bafflers withina revoluble hollow member, such as a drum, shaft, or cylinder. Fig. 4 is a longitudinal sectional elevation of a mixer of the type shown by Fig. 3, illustrating a preferred arrangement of two helical bafflers within a revoluble hollow member. Fig. 5 is a plan (No model.)

view of the mixer, with the revoluble hollow member partly broken away and in section, said view showing one means for revolubly mounting and rotating said member. Fig. 6 is an elevation looking at the charging or inlet end of the machine.

Similar letters refer to similar parts in every figure.

My invention is as follows.

Within the revolving shell A, I place a plurality of helical bafflers B, each of said bafflers being of normal pitch, as shown by Fig. 1. In many cases one is suflicient; but in drums of large diameter it is often advantageous to use two or more baffiers of equal size and of normal pitch, as indicated at B C, as shown in Fig. 1, for by so doing the ca pacity of the machine is increased without detriment to the quality of the mixing.

A preferred form or construction of the invention consists in placing within the larger baffler D, Fig. 4, another one of smaller diameter, E, and by preference the smaller one has a greater pitch than the outer and larger one. The object of this arrangement is to attain a more thorough admixture, for the baffler E, conveying the material quicker than the baffier D, will cause a constant commingling of the materials in the two lines of travel, and to attain this end more fully by preference I make one or both bafflers of irregular pitch and place them so that at points equidistant from the end of the mixer where the pitch is greater in the one it is normal or less than normal in the corresponding part of the other, so that where the pitch is less in the outer baifier the material in its passage will so pile up that a greater portion thereof than usual will come under the influence of the inner bafiier of greater relative pitch at that point and. will be carried forward to intermix with the material farther ahead on the lower line of travel, and vice versa. Where the pitch of the inner bafi ler is less at that I point, the outer baflier will receive within its sphere of action more of the material from the inner line of travel.

In Fig. l of the drawings I have shown a plurality of bafflers B 0 within the revolving drum, said bafilers being of equal diameters and intertwined one with the other. Fig. A of the drawings shows a plurality of baffiers D E, the latter, E, being of smaller diameter than the former, D, and arranged within the same. It is evident to those skilled in the art that instead of using a single baffier D or E in the construction of Fig. 4: I may use a plurality of interwined bafflers of uniform diameter, similar to the bafflers B C of Fig. 1; but as such duplication of the bafliers D or E is an obvious expedient I have not considered it necessary to illustrate the same by the drawings.

In Figs. 5 and 6 of the drawings I have represented one embodiment of means for mounting and driving the drum which constitutes the hollow revoluble member. The drum A is shown as being provided with circumferential track-bands a,witl1 which engage a plurality of bearing-rollers a, the latter being journaled in suitable bearings b, which are supported by a suitable horizontal base or frame B. This revoluble member A is also provided with an externalgear G, the same having intermeshing engagement with a driving gear-pinion 0, which is carried by a horizontal shaft D, the latter being journaled in suit.- able bearings (Z, provided on said base or frame. This shaft D is adapted to be rotated by any suitable means, and the motion of the gear 0 is communicated to the gear C for the purpose of rotating the drum A, the latter being supported by the rollers a, so as to turn easily and freely on the base or frame B.

In order to prevent the material from caking up or lodging within the angle form'ed between the bafller or baffiers and the shell of the drum or hollow shaft, I prefer leaving a space at that point, as shown at F. For the purpose of convenience in cleaning and repairs I prefer to have the baflier or baffiers so constructed that they can be bodily and easily withdrawn through the open delivery end of the drum or shell. This I accomplish by attaching the bafiler or baffiers to the bars G, of which there are two or more. One or more of these are in turn engaged by the bar or bars H, which are rigidly attached to the shell of the cylinder and by which the baffler or bafiiers are fixed in relation thereto. When the drum or hollow shaft is in motion, the action of the material mixing will cause the bafiier 01' bafflers to thrust against the head K of the drum A, which will keep it or them from further independent movement; but in cases where there is no head the bars G and H can be bolted together, as at R, to prevent this movement, or other of any of the well-known devices may be used to attain this end.

The head K of the mixer shown by Figs. 1 and 2 is attached in a suitable way to the receiving or charging end portion of the revoluble member. This head IS provided with a central'opening in, which 1s shown in elevation by Figs. 2 and 6 and in section by Fig,

5, said opening 75 being of less diameter than the bafHer or bafliers in order that the material may be supplied to the revoluble member. The head may furnish an abutment for the baffler to restrain it from endwise displacement in one direction within the revoluble member.

The head K in the construction shown by Figs. 3 and 4 has an opening of less diameter than the smaller internal baflier E. (See Figs. 3, 5, and 6.) The material is adapted to be charged into the drum through this opening in the mixer. The head K in this form of construction affords an abutment for both the bafflers D E to restrain them against endwise movement in one direction.

From the foregoing description, taken in connection with Figs. 1, 4, 5, and 6 of the drawings, it will be seen that the hollow revoluble member or drum A is provided at its receiving or charging end with a head having an opening, while the other end of the drum is open for the free delivery of the material which is mixed by the operation of the bafflers and the rotation of the drum or member. The baflier or bafflers extend continuously throughout the hollow member or drum, so

that the machine will serve as a continuous mixer, the material being received through the head K of the drum and discharged through the other open end thereof.

The baffier or bafliers in the mixing-machine of my invention are not attached permanently to the drum or hollow member nor to one another, but the connection between the part or parts is afforded by longitudinallydisposed bars, which are arranged to insure the rotation of the baffier or bafflers with the drum and which also permit the baflier or baiflers to be withdrawnv endwise from said drum through the open delivery end thereof.

In the construction shown by Figs. 1 and 2 the drum is provided on its inside with longitudinal bars H, while the baffiers B C are furnished with complemental longitudinal bars G, the latter being disposed in lateral abutting engagement with the bars H. On the rotation of the drum or member the bars ,H engage with the bars Gr to insure rotation ofthe bars G and bafflers B C with the member or drum A; but when the machine is at rest the bafliers B C and the bars H may be withdrawn endwise from the drum without disconnecting the latter from its supporting devices, such asthe rollers 60, on the'frame or base.

The construction of parts shown by Figs. 3 and I is similar to the devices of Figs. 1 and 2, except that the inner baffler E is connected by longitudinal bars L to the larger baffler D, the latter being provided with longitudinal bars G, which are disposed for engagement with similar bars H, which are fastened to the inside of the drum or member A. This construction permits the baflier E to be withdrawn endwise from the drum and the baflier B, and, if desired, said bafller B may also be removed from the drum, the bars G sliding lengthwise of the bars H. The bolts R are only used in cases of emergency and when the hollow member or drum A is not provided with a head, as K.

The inner baflier or bafflers E by preference are rigidly attached to the outer baflier or baiflers at two or more points, as shown at L, or by any convenient means. For the purpose of mixing such material as mortar, &c., I prefer to break the baiflers or puncture them with holes, as at M, Fig. 1.

I do not limit my invention to cylindrical drums, for the periphery of the drum or shaft may be many sided and of any convenient shape and the helical bafliers may be shaped to more or less conform thereto; nor do I confine my invention to mixing-mills, for the use of these helical bafflers, in combination with a hollow revolving shaft, makes an excellent conveyer for broken stone and such like materials.

What I claim, and desire to secure by Letters Patent, is

1. A machine of the class described, having an imperforate revoluble member open at one end, a baffler within said member and unattached thereto, and cooperating devices on said member and. the balfler for insuring the rotation of the latter with the former, said baflier being withdrawableendwise through the open end of the member.

2. A machine of the class described, having a revoluble imperforate member open at one end, a baffler within said member and unattached thereto, and bars fixed to the baflier and the member respectively, said bars of the baffler having slidable engagement with the bars of the member on the end Wise movement of the bafller, and also insuring the rotation of said bafl'ler with said member.

3. A machine of the class described, having a revoluble hollow member, a baflier therein, and cooperating'bars on the member and baffler to make the latter rotate with the member and to permit the baffler to be inserted or withdrawn endwise.

1. A machine of the class described, having a revoluble imperforate hollow member, and a plurality of bafllers each having flights of irregular pitch and mounted within said member, one baffler having a flight of one pitch disposed in cooperative relation to a flight of a dissimilar pitch of the companion baflier.

5. A machine of the class described, having a revoluble imperforate hollow member, and a plurality of bafliers each having flights of irregular pitch disposed in cooperative relation to one another and all mounted within said hollow member for rotation therewith.

6. A. machine of the class described, having a hollow imperforate revoluble member, and a plurality of bafflers each having flights of unequal pitch; said bafflers being of varying diameter and disposed for a baffler of small diameter to lie within a baffler of greater diameter, said bafflers being arranged for their flights of unequal pitch to have cooperative relation, and all of said baiflers being mounted within said drum.

7 A machine of the class described, having a hollow imperforate member, and a plurality of bafliers disposed within said member, the bafller of greatest diameter being fitted to the drum for rotation therewith, and the baflier of less diameter being mounted within said larger baifler, the pitch of each baffler being irregular.

8. A machine of the class described, having a hollow imperforate revoluble member, and a plurality of helical bafflers each having flights of irregular pitch and mounted within said member, said bafliers being relatively arranged for a portion of increased pitch on one baffler to lie adjacent to a portion of less pitch on the companion bafl'ler.

9. A machine of the class described, having a hollow revoluble member, and helical bafflers of different diameters disposed within said member and within one another, the pitch of the large baflier varying in reverse ratio to the variations of pitch of the smaller baffler.

.10. A machine of the class described, having a hollow revoluble member, a continuous heli cal baflier within said member, longitudinal bars attached to said bafl'ler and to the member respectively, and having lateral abutting engagement and adapted to slide one on the other, said bars being effective in insuring rotation of the baffler with said member and to relatively space said parts to produce an annular clearance-space between the inner surface of the member and the edge of the helical baffler.

1 1. A machine of the class described, having a hollow imperforate member, a continuous helical bafller having flights of irregular pitch mounted within said member and spaced relatively thereto, and another continuous helical bafller also having flights of irregular pitch and disposed within the first-named bafller for the flights of the two bafliers to lie in cooperative relation.

12. A machine of the class described, having a revoluble imperforate member, a helical baffler having flights of irregular pitch and disposed in said member for rotation therewith, and another bafflcr also having flights of irregular pitch and superposed upon and athwart the first-named baffler.

13. A machine of the class described, having a revoluble hollow member, ahelical continu- With the member and having a normally unons bafiler disposed in and revoluble With said 1 obstructed charging-opening of less diameter IO member, and another baffler superposed upon than the bafiler, said head affording an abutand athwart the first-named continuous bafment for the bafiler.

fier. ERNEST LESLIE RANSOME.

14. A machine of the class described, having Witnesses: a hollowrevoluble member, a helical bafiier A. W. RANSOME,

attached Within said member, and a head fast JOHN ELLENDT. 

